<template>
  <div class="home-category" @mouseleave="categoryId = null">
    <ul class="menu">
      <li
        :class="{ active: categoryId === item.id }"
        v-for="item in menuList"
        :key="item.id"
        @mouseenter="categoryId = item.id"
      >
        <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
        <template v-if="item.children">
          <RouterLink
            v-for="sub in item.children"
            :key="sub.id"
            :to="`/category/sub/${sub.id}`"
          >
            {{ sub.name }}
          </RouterLink>
        </template>
        <span v-else>
          <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
        </span>
      </li>
    </ul>
    <!-- 弹层 -->
  <div class="layer">
    <h4 v-if="currCategory">
      {{ currCategory.id === "brand" ? "品牌" : "分类" }}推荐
      <small>根据您的购买或浏览记录推荐</small>
    </h4>
    <ul v-if="currCategory && currCategory.goods && currCategory.goods.length">
      <li v-for="item in currCategory.goods" :key="item.id">
        <RouterLink :to="`/product/${item.id}`">
          <img :src="item.picture" alt="" />
          <div class="info">
            <p class="name ellipsis-2">{{ item.name }}</p>
            <p class="desc ellipsis">{{ item.desc }}</p>
            <p class="price"><i>¥</i>{{ item.price }}</p>
          </div>
        </RouterLink>
      </li>
    </ul>
    <ul
      v-if="currCategory && currCategory.brands && currCategory.brands.length"
    >
      <li class="brand" v-for="item in currCategory.brands" :key="item.id">
        <RouterLink to="/">
          <img :src="item.picture" alt="" />
          <div class="info">
            <p class="place">
              <i class="iconfont icon-dingwei"></i>{{ item.place }}
            </p>
            <p class="name ellipsis">{{ item.name }}</p>
            <p class="desc ellipsis-2">{{ item.desc }}</p>
          </div>
        </RouterLink>
      </li>
    </ul>
  </div>
  </div>
  
</template>

<script>
import { useStore } from "vuex";
import { ref, reactive, computed } from "vue";
import { findBrand } from "../../api/home.js";
export default {
  name: "HomeCategory",
  // 1. 获取vuex的一级分类，并且只需要两个二级分类
  // 2. 需要在组件内部，定义一个品牌数据
  // 3. 根据vuex的分类数据和组件中定义品牌数据，得到左侧分类完整数据(9分类+1品牌)数组
  // 4. 进行渲染即可
  setup() {
    const brand = reactive({
      id: "brand",
      name: "品牌",
      children: [{ id: "brand-chilren", name: "品牌推荐" }],
      brands: [],
    });

    const store = useStore();
    const menuList = computed(() => {
      // console.log(store.state.category.list);
      const list = store.state.category.list.map((item) => {
        return {
          id: item.id,
          name: item.name,
          // 防止初始化没有children的时候调用slice函数报错
          children: item.children && item.children.slice(0, 2),
          goods: item.goods,
        };
      });
      list.push(brand);
      return list;
    });
    // 获取当前分类逻辑
    const categoryId = ref(null);
    const currCategory = computed(() => {
      return menuList.value.find((item) => item.id === categoryId.value);
    });
    findBrand().then((data) => {
      // console.log(data);
      brand.brands = data.data.result;
    });
    return { menuList, categoryId, currCategory };
  },
};
</script>

<style scoped lang="less">
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,
      &.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
  width: 990px;
  height: 500px;
  background: rgba(255, 255, 255, 0.8);
  position: absolute;
  left: 250px;
  top: 0;
  display: none;
  padding: 0 15px;
  h4 {
    font-size: 20px;
    font-weight: normal;
    line-height: 80px;
    small {
      font-size: 16px;
      color: #666;
    }
  }
  ul {
    display: flex;
    flex-wrap: wrap;
    li {
      width: 310px;
      height: 120px;
      margin-right: 15px;
      margin-bottom: 15px;
      border: 1px solid #eee;
      border-radius: 4px;
      background: #fff;
      &:nth-child(3n) {
        margin-right: 0;
      }
      a {
        display: flex;
        width: 100%;
        height: 100%;
        align-items: center;
        padding: 10px;
        &:hover {
          background: #e3f9f4;
        }
        img {
          width: 95px;
          height: 95px;
        }
        .info {
          padding-left: 10px;
          line-height: 24px;
          width: 190px;
          .name {
            font-size: 16px;
            color: #666;
          }
          .desc {
            color: #999;
          }
          .price {
            font-size: 22px;
            color: @priceColor;
            i {
              font-size: 16px;
            }
          }
        }
      }
    }
  }
}
&:hover {
  .layer {
    display: block;
  }
}
}

li.brand {
  height: 180px;
  a {
    align-items: flex-start;
    img {
      width: 120px;
      height: 160px;
    }
    .info {
      p {
        margin-top: 8px;
      }
      .place {
        color: #999;
      }
    }
  }
}
.xtx-skeleton {
  animation: fade 1s linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
</style>
